Vacuum unit-valve.



M. E. BELL.

VACUUM UNIT VALVE.

APPLICATION rum) APILI, 1914.

Patented Nov. 10. 1914.

Ill/Ill I MlwjZfBelL Witnesses Inventor O W Attorneys n1" NORRIS PETERS 60.. PNOIO-Ln'n WASHINGIIJM. 0 Li MILESEL BELL, OF MINNEAPOLIS, MINNESOTA.

VACUUM UNIT-VALVE.

Specification 01 Letters Patent.

Patented Nov. 10, 19.14.

Application filed April 1, 1914. Serial No. 828,877.

To all whom it may concern:

Be it known that 1, MILES E. BELL, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented anew and useful Vacuum Unit-Valve, of which the following is a specification.

The present invention relates to improvements in vacuum unit valves, and more particularly to that type of valve used in connection with my heating system as shown in my co-pending application filed July 22,

1913, Serial No. 780,597, one object of the invention, being the provision of avalve that remains open to the escape of air at all times, until the pressure in the boiler closes it through a pipe connected to the boiler and in the system.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed,it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings-Figure l is a vertical central sectional view through the complete valve. Fig. 2 is a section taken on line 2-2 of Fig. 1. Fig. 3 is a section taken on line 3-3 of Fig. 1.

Referring to the drawings, the numeral 1 designates the casing which is threaded at 2 for connection with the return pipe Of the heating system, a vertical cylinder or pipe 3 being connected to the casing 1 to constitute in reality an integral portion of the casing. A pipe 4 is cast integral With the casing 1 for connection with the supply pipe of the heating system, the same terminating in the concentrically disposed threaded outlet 5, the inner end of said pipe 4 being additionally supported within the casing 1 by means of the web 6. Connected in the threaded end 5 of the pipe 4 and standing concentrically within the pipe 3, is a vertical pipe 7 disposed for the reception of the slidably mounted tubular valve member 8 Whose upper end is sealed at 9 adjacent the circumferential rim 10, an open ended chamber or valve 12 being formed by the extension 11, the purpose of which will presently appear. A plurality of radial ports 13 are provided through the rim 10 and are in communication with the lower end of the chamber 12 while a plurality of ports 15 are formed in the wall of the tubular extension 11, there being one or more ports drilled in sizes corresponding with the number of square feet of radiation.

Seated within the upper end of the vertical pipe 3 and held therein by screw threads, is adctachable member or plug 17 provided with a cylindrical bore 16 which is adapted to receive at all times the upper end of the extension 11 so that when said extension assumes the dotted line position, as shown in Fig. 1, the rim 10 will engage the under side of the member 17 and thus limit the elevation of the valve member 8. The upper end of the bore 16 is provided with the valve seated outlet 18 for the reception of the wing valve 19 which being disposed in a vertical position will normally seat by gravity but will permit the necessary escape of air from within when conducted through the inlet 2 about the pipe 7 and through the respective ports 13 and 15. A protecting cap 20 is provided, and such cap is provided with one or more outlet ports 21 so that the air escaping through the bore 16 will be permitted escape through the ports 21 of the cap 20.

In connecting the present valve in a heating system, the portion 2 is connected directly to the return pipe of the heating system, while the portion 4 is connected to receive fluid from the feed or supply pipe thereof, thus permitting the live steam or vaporto be directed within the valve 8 to elevate the same by pressure from the boiler, the air in the system being directed through the portion 2 and finally out of the valve controlled port 18, the valve 19 thereof automatically closing to retain a vacuum within the system during the period after air has finished escaping.

WVhat is claimed is:

1. A device of this character, including a vertical tubular casing open at both ends, a plug having a bore therethrough sealing the upper end thereof, an outwardly opening valve controlling the bore of the plug, a pipe mounted within the casing and terminating below the plug, the lower end of said pipe being projected cxteriorly of the casing, a tube having-an annular rim intermediate of its ends, a partition adjacent the rim within the same dividing the tube into two oppositely opening compartments, one end of said tube being slidably mounted within the pipe with the rim limiting the position thereof within the pipe, the portion of the tube above the rim being provided with a plurality of ports and the upper portion of the rim being slidably mounted. within the lower end of the bore of the plug, whereby when the tube is elevated, the ports are closed by the plug, the communication between the casing and the plug being through the ports of the tube.

2. A device of this character, including a vertical tubular casing open at both ends,

a plug sealing the upper end thereof and having a cylindrical bore terminating in a valve seat, a valve controllmg said bore, a

pipe mounted within the casing and terminating below the plug, said pipe having its lower end projecting exteriorly of the casing, a sealed tube slidably mounted in the pipe with its sealed end adjacent the open end of the pipe, a peripheral rim carried adjacent the sealed end of the tube for limiting the projection of the tube Within the pipe, there being a plurality of ports formed through said rim above the sealed end of the tube, and a cylindrical valve carried by the sealed end of the tube and projecting above the rim, said cylindrical valve being slidably mounted in the bore of the plug Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

